Pump-valve gear



^ P. C. DU BOIS.

PUMP-VALVE GEAR.

' Patented June 2.0, Y1882.

N. PETERS. FiwlLilhograher. Wnhinglon. D. C.

y, Uiivrrnn STATES @PATENT Critica.

PIERRE C. DU BOIS, OF SAN FRANCISCO, CALIFORNIA,.

PUM P-VALVE GEAR.

SPECIFICATION 'forming part of Letters Patent No. 259,830, dated June 20, 1882.

l Application nieu December a, lesi. (No model.)

ber and connecting-passages formed of lead or other suitable noli-corrosive material.

Referring to the accompanying drawings, Figure l is a side view ot iny invention. Fig. Zis a vertical section, and Figs. 3, 4, and 5 are enlarged views, of the valves and seats. Fig. 6 shows a modification.

In any process for treating ores by chlorination where the chlorine gas is employed under pressure it is necessary to condense it, and the pumps and valve-gear employed to carry it become corroded in a short time, so as not to work, especially where exposed to the action of a strong current of the gas, as when it is passing through the valves.

My invention is intended to overcome this difculty by the use of glass for valves, and at points where a current of gas impinges against the sides of a valve-opening or the walls of a passage.

A is a pump having piston, pistonrod,stut' ting-box, and openings to the Valve-chamber, made in the usual or in any suitable manner, aiid lined with lead or other substance which will resist the corrosive action of the gas.

B is a T-shaped passage, leading from the pump to the valves, as shown. his passage is preferably formed iii lead, and at its lower end is formed a chamber, a, suflciently large to receive the lower valve and allow it to work.

A disk, El, of lead, of the same diameter as the vertical portion of the tube, is made to fit upon the top of the valve-seat, as will hereinafter vbe shown, and it has a similar chamber, a, formed in its lower surface to receive the upper valve.

'lhe valve-seats C are formed of glass, as are also the valves D D. Around each valveseat C is tted a rubber ring, E, the edges of the seat being formed in any way to hold the two together, as by tongues and grooves. The glass seats are of such a size that theyjust iill the diameter of the passage B, while the rubber rings E rest upon the ends ofthe metal inclosiiig the passages.

F F are two disks or tlan ges, having holes through their edges to admit long screw-bolts G, which extend dowll outside the valve-chaillber and serve to bind the whole together.

The upper valve-seat, with its rubber ring, is laid upon the top of the tube. The disk H is placed upon the top of the rubber ring. The packing-disk P is laid on H, and the disk F upon the top of this. The lower valve-seat, with its rubber ring, is held against tliebottom of the tube by the lower aiige, F, and

the valves being in their respective chambers a a' the nuts are turned up on the bolts G until the whole is clamped ilrml y together.

rj he rubber rings E receive the pressure and protect the glass seats from breakage, but are not sufficiently exposed to the action ot the gas to become destroyed.

I I are the inlet and discharge pipes.

The glass valve-seats surround the narrow opening through which the gas passes at considerable speed when pumped, aiid thus prevent corrosion at this point, while the valves themselves being iliade of glass will not corrode. v

The lead T is sufficiently lion-corrosive for the main passage; but it' used at the valveopenin g the gas would soon cut it so that the valve-seat would leak aiid become worthless, and this is prevelited by my device.

In the modification showil iii Fig. 3 the glass valve-seat may be inserted in a depression in the rubber rin g'. Iii the nloditicat-ion shown in Fig. 6 the glass seat has ali upwardly-projecting rim surrounding the valve.

Haviu g thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a pump, the glass valveseats C, perforated in the center, in combination with the inclosing elastic rings E, substantially as and for the purpose herein described.

2. In a pump, the valve mechanism consisting of lthe inlet and discharge passages B, formed in a T as shown, in combination with the glass valve-seats C, inclosed by the elastic rings E, the disk H, and the end anges, F,

seats inay he secured in the chamber without and scouring-bolts Gv, substantially as herein breakin g", substantially as herein described.

described. In witness whereof I have hereunto set my 3. The improvementin pumps for moving hand.

corrosive gases under` pressure, consisting of PIERRE C. DU BOIS.

the perforated glass valve-seats C, and the Witnesses:

glass valves D D', in combination with the FRANK A. BROOKS, elastic rings E, surrounding the seats and forml S. H. NOURSE.

ing a support and packing, so that thc vahciu 

